Device for imparting combined rotary and reciprocating movement



J.v THOMSON.

(No Model.) l

DEVICE FOR IMPARIING COMBINED ROTARY AND REOIPEOOATING MOVEMENT.

No. 378,344. Patented Feb. 21, 1888.

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L JOHN THOMSON, OF BROOKLYN, EEIV YORK, ASSIGNOR TO THE COL'S PATENTFIRE ARMS MANUFACTURING CO'IPANY, OF HAIt'iFORD,

CONNECTICUT.

DEViCE FOR IMPARTING COMBINED ROTARY AND RCIPROCATING MOVEMENT.

SPECICATIION forming part of Letters Patent No. 378,344, dated February2l, 1838.

Serial No. 252,i5. (Xo modem To ccZZ whom, it may concern:

Be it known that I, JOHN THOMSON, acitizen of the United States, and aresident of Brook` lyn, Kings county, New York, have invented certainnenY and useful Improvements in Devices for Imparting Combined Rotaryan( It ciprocating Movements, of which the following is a specification.

This invention relates to mechanical movements, and the object thereofis to impart a combined .rotary and reciprocating motion to any d eyicewhere such may he desirable. The

particular advantage ot' the device, however,

consists in the ahilit-y to change either the extent ot' thereciprocating action or the speed thereof with respect to the rotarymotion. I regard the device as particularly applicable in the productionof the irregular forms by the control Ofthr1ners, as used in lathes andinillingniachines, and also for ink-mills and dislribntiiig-cylindersol' printing-presses.

In the drawings herewith presented, iilnsirating iny invent-ion, I havechosen to repre sent the same applied to ahollow cylindersuch, l'orinstance, as might he usedin a printing-press.

Figure l ot' said drawings is a vertical longitudinal section throughthe cylinder, exposing the internal apparatus in elevation and section.2 is a transverse section on the line 2, viewed in the direction ofarrows. Fig. 3 is a right-hand end elevation with thestandard removed 5and Fig. et is a detached View of a portion of cylinder, a section ofwhich is broken away, the View being in the direction of arrow 5 oi'Figi i..

The general description and operation of the device are as foliows:

Mounted in standards, as 6 7, and free to rotate therein, is a shaft, S,on one end of which is fixedly mounted a gear-wheel, 9, which ispresumed to mesh with a main or primary driving-gear, as l0. I.Vithinthe cylinder A are two arms or Webs, l1 l2, in which are formedjournal-bearings 13 14 for the shaft 8. The cylinder A is connected soas to have rotary movement with thc shaft and a longitudinalreciprocating movement on the shaft by anysuitahle means. Thatshown,which I have found exceedingly strong and efficient, consists in theboss l5, which is formed as a partofthe secondary gear 9, having twodrivingpins, 1G I7, which are xedly mounted thereon and which projectforward Within the cylinder and have free engagementwith the hearings 171S, formed in the arm 1l. On the opposite end of the shaft a sleeve, I9,is secured, as oy the setholt20.v upon one side of which is formed astad, 21, and from the other side oi' which projects a counter Weight, 22.rilhere is also freely mounted upon the shaft 8 a bevelfgcar, 23, butwhich is fixed against rotation to the standard 7, as by the bolts 2t.

,Iounted upon the stud 2i ofthe sleeve is a bevel-gear adapted to engagethe fixed gear 23. On the outer surface of the gear is formed a canrstndor wristvpin, 2G, which carries a friction-roller, 27. 'vhen a stud isused, itis set eccentric to the axis of the gear 25, and may headjustahiy mounted, so as to reguiate the amount ot' reciprocation ofthe cylinder. The said roller acts in the slot 28, formed by the lugs 2930, Which project from the inner surface of the cylinder. Rotary motionheinginiparted to the gear 9, the result will be as follows: Thedriving-pins canse the cylinder to rotate with the said gear, as alsothe shaft, the sleeve, and bevel gea-r 25, and, as the bevelgear 23 isfixed against rotation, this causes the gear 25 to partake of rotarymotion upon its own axis, as well as to he carried in a circular pathwith the shaft and cylinder. Strictly defined, it is an epic-yelegeartrain. Such niotion of the gear 25 causes the stud or Wristpin 26 tofoilow the path indicated hy dotted line 3l of Fig. et, thereby drivingthe cylinder hack and forth upon the shaft, as indicated by dotted lines32, Fig. l. To change the extent of the reciprocation of the cylinder,it is simply necessary to increase or decrease the distance of the studor Wrist-pin 2G from the center ofthe gea-r 25. To cha-nge the number ofreciprocations of the cylinder to each complete rotation thereof, it issimply required to properly proportion the relation of the gears to ootain the desired result. For instance, the ar rangement shown in thedrawings gives for one complete rotation of the cylinder approximatelyseventy three one-hundredths of the complete throW of the crank or stud26.

lVhere severe duty is required another stud may be formed on the sleevein lieu of the counter-Weight, and. an additional gear with Wrist-pinand frietion-roller may be mounted thereon the duplicate of gear 25, thecylinder also having another slot diaxnetrically opposite from thatshown in the drawings. In other Words, the cylinder would then bereciprocated by a pair of gears, and so arranged the action would be inits theoretically most perfect fo rm.

As a whole, the operation of the device here illustrated and describedis exceedingly smooth at very fast rates of action and is simple andeasy to construct.

The general arrangement and disposal of the parts here shownthat is,selfcontained Within the cylinder-are also favorable for many purposes,as no eXtra space outside is occupied by the device. When so arranged,to avoid any annoyance from the Working out of oil which may accumulate,I form the cylinder with an inwardly-projecting flange, 33, which thusacts to prevent the oil from escaping therefrom to the limit of thedepth of the said iiange.

If it is desirable to discontinue the reciprocating actions at any time,it is only necessary to remove the stop-bolts 24, in consequence ofwhich the gear 23 will be free to rotate with the shaft and cylinder,the gear 25 being thus not revolved upon its own axis.

It is evident that thc circular motion ofthe cylinder or roll might beobtained by a key or feather fixed in the shaft operating in a slot inthe bearings; but the pinsare the more preferable form of construction,in that a much greater area of bearingsurfaceis obtained, and that,beingfarther from the center,the pressure thereon is very much less, besideswhich they are more convenient to lubricate and cheaper to construct.

While Ihaveshown' my invention as applied to one particular form ofmechanism, it is evident that the principles thereof may be appliedtormany and various forms by those skilledin the art without materialchange.

1. The combination, With a rotary shaft, of a cylinder mounted so as torotate therewith and free to reciprocatelongitudinally thereon, astationary gear, a gear carried by the shaft meshing with saidstationary gear, and an eecentric connection between said gear and thecylinder, substantially as described.

2. The combination, with a rotary shaft, of a cylinder mounted so as torotate therewith and free to reciprocate longitudinally thereon andprovided with engaging-lugs, a stationary beveled gear surrounding saidshaft, a beveled gear carried by the shaft meshing With the stationarygear, and a pin mounted eccentric ally on said gear, substantially asdescribed.

8. The combination, with a revolving shaft and a cylinder freely mountedthereon, of a bosser hub, as l5, fixed on the shaft andpro vided withdriving-pins, as 16 17, thereby causing the rotation ofthe cylinder,While at the same time permitting it to be reciprocated upon lthe shaftand driving-pins, substantially as described.

4. The combination, with a rotary shaft and a reciprocating cylindermounted thereon,said cylinder being provided with engaging-lugs, of afixed gear, a sleeve carried by the shaft and provided with abearing-pin, and agear mounted on said bearing-pin and having aneccentric stud, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two snb scribing Witnesses.

JOI-IN THOMSON.

Vitnesses:

J. S. BARKER, F. L. FREEMAN.

